print(10 + 20)
a = 1
a = a + 1
print(a)
a += 1
print(a)
str01 = '我爱你中国'
str02 = '亲爱的母亲'
print(str01 + str02)
slogan = '桃李不言'
slogan += '下自成蹊'
print(slogan)
print(10 - 20)
print(10 * 20)
print(2 * 3)
# 幂运算
print(2 ** 3)
print(10 / 20)
# 地板除
print(10 // 20)
print(20 // 6)
# 取模运算
print(20 % 3)